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macronutrient

[mak-roh-noo-tree-uh nt, -nyoo-] /ˌmæk roʊˈnu tri ənt, -ˈnyu-/
noun
1.
Nutrition. any of the nutritional components of the diet that are required in relatively large amounts: protein, carbohydrate, fat, and the macrominerals.
2.
Botany. any of the three chemical elements required by plants in relatively large amounts: nitrogen, phosphorus, and potassium.
Compare micronutrient.
Origin
1940-1945
1940-45; macro- + nutrient
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for macronutrients

macronutrient

/ˌmækrəʊˈnjuːtrɪənt/
noun
1.
any substance, such as carbon, hydrogen, or oxygen, that is required in large amounts for healthy growth and development
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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macronutrients in Medicine

macronutrient mac·ro·nu·tri·ent (māk'rō-nōō'trē-ənt, -nyōō'-)
n.
A nutrient required in large amounts for the normal growth and development of an organism.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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